Florida homes that feature flat roofing, or low-slope roof sections, require a specialized roofing system designed to prevent standing water and provide long-term waterproof protection.
Wind Protection
Lifespan
Material Warranty
Workmanship Warranty
At Weatherproof Roofing, we install CertainTeed Flintlastic® GTA, a premium APP modified bitumen roofing system engineered to withstand Florida’s intense sun, heavy rain, and severe weather. Its reinforced construction and durable granulated surface create a multi-layer waterproof barrier built to perform for decades.
CertainTeed has built a reputation for manufacturing dependable roofing products, and Flintlastic GTA has become one of the industry’s most trusted modified bitumen systems.
Flat and low-slope roofs require roofing systems specifically designed to provide continuous waterproof protection, particularly during Florida’s heavy rains. Weatherproof Roofing installs CertainTeed Flintlastic® GTA, an APP modified bitumen system that creates a durable, multi-layer barrier against water, UV exposure, and severe weather. It’s well suited for flat and low-slope areas where conventional shingles aren’t appropriate.
Asphalt shingles rely on roof slope and gravity to shed water efficiently. On a flat or very low-slope roof, water drains more slowly and can collect in areas, increasing the potential for water intrusion. Modified bitumen systems are designed to create a more continuous waterproof barrier, making them a much better solution for lanais, additions, garages, porches, and other low-slope sections of Florida homes.
CertainTeed Flintlastic® GTA is a premium APP modified bitumen roofing product designed for flat and low-slope applications. It combines durable polyester reinforcement with a protective granulated surface to create a strong, weather-resistant roofing system. When installed as part of a complete system, multiple layers work together to provide the waterproof protection and durability that low-slope roofs require.
We choose CertainTeed Flintlastic GTA because it provides the combination of waterproofing, UV resistance, strength, and long-term durability we look for in a Florida flat roofing system. Its reinforced construction is designed to stand up to demanding weather conditions, while the granulated surface provides additional protection from the intense sunlight and heat common throughout Tampa Bay.
A professionally installed modified bitumen roofing system can typically provide approximately 20 to 30 years of service, depending on factors such as sun exposure, drainage, storm activity, maintenance, and overall roof design. Routine inspections and addressing small problems before they become significant can help homeowners get the maximum service life from their flat roof.
Water management is one of the most important considerations when installing any flat or low-slope roof in Florida. A properly installed modified bitumen system provides multiple layers of waterproof protection, but proper drainage, flashing, edge details, and treatment around roof penetrations are equally important. Weatherproof Roofing considers the complete roof assembly to help prevent water intrusion and provide dependable protection during Florida’s frequent heavy rainfall.
Flat roofing systems are evaluated differently from asphalt shingles, so their performance isn’t expressed using the same standard shingle wind-speed classifications. Wind resistance depends on the complete roof assembly, attachment method, roof design, and quality of installation. When properly installed, modified bitumen systems such as Flintlastic GTA are designed to provide strong resistance to wind uplift and comply with applicable Florida building code requirements.
Depending on the complete roofing system selected and how it is installed, CertainTeed Flintlastic GTA systems may qualify for manufacturer warranty options ranging from 10 to 25 years. Options can include material-only coverage as well as enhanced system warranties for qualifying installations. Weatherproof Roofing can explain the available warranty options for your particular roof so you understand the coverage before work begins.
A flat roof isn’t inherently destined to leak, but proper design and installation are especially important because water doesn’t drain from it as quickly as it does from a steep-sloped roof. Poor drainage, improperly sealed penetrations, inadequate flashing, or installation mistakes can create potential trouble spots. A quality modified bitumen system combined with careful installation provides the waterproof protection necessary for reliable long-term performance.
Flat roofing typically costs more per square foot than standard asphalt shingles because it requires specialized materials, installation techniques, and waterproofing details. The final price depends on factors such as roof size, accessibility, drainage, existing roof removal, flashing, and the number of penetrations for vents or HVAC equipment. Weatherproof Roofing can inspect the roof and provide a quote based on the specific requirements of your property.
A properly installed modified bitumen roof generally requires relatively little maintenance, but periodic inspections are still important. Keeping drainage areas clear and identifying damage, flashing issues, or problems around roof penetrations early can prevent relatively minor concerns from developing into expensive repairs. Inspections are especially worthwhile following major storms or severe weather.
Flintlastic GTA is an excellent option for many residential flat and low-slope applications, particularly lanais, porches, garages, additions, and contemporary home designs. The right solution ultimately depends on your roof’s slope, drainage, existing construction, and other site-specific factors. Weatherproof Roofing can evaluate your roof and recommend a system designed to provide dependable waterproof protection for your particular home.